Cobalt Strike Beacon

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I should add that this is a code that is still in its infancy and cannot be used out of the box. More people are welcome to make corrections and additions to it. Technology shouldn’t be closed, right?

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Overview

This is a project I have saved on my computer, I just didn't think I should keep it private since I can no longer find it anywhere on the internet. This project aims to provide a fully functional, from-scratch alternative to the Cobalt Strike Beacon, providing transparency and flexibility to security professionals and enthusiasts.

This project is not a reverse-engineered version of the Cobalt Strike Beacon, but a complete open source implementation. The "settings.h" file contains macros for the C2 configuration file and the user should complete it to their liking. Once you have your "settings.h" template ready, feel free to share and contribute.

PS. explain something.I don’t remember who deleted it after it was made public, but I read this project and I think it can help many people who are trying to reconstruct Beacon.

Prerequisites

• Visual Studio: The project is built using Visual Studio, not Visual Studio Code.
• libtommath: A fast, portable number-theoretic multiple-precision integer library.
• libtomcrypt: A modular and portable cryptographic toolkit.

Getting Started

1. Clone the repository

2. Open the project in Visual Studio.

3. Ensure that the required dependencies (libtommath, libtomcrypt) are properly configured and linked with the project.

4. Build the project.

5. Create your settings.h file based on the provided template. Make sure to include your C2 Profile macros and configurations.

6. Build the project again to apply your custom settings.

7. Execute the compiled binary.

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You need to build your own settings.h, which contains these ~ 🥲lovelorn day

S_C2_VERB_POST
S_PROXY_USER
S_PROXY_CONFIG
S_MAX_RETRY_STRATEGY_INCREASE
S_TCP_FRAME_HEADER
S_HOST_HEADER
S_PROCINJ_TRANSFORM_X86
S_SMB_FRAME_HEADER
S_C2_RECOVER
S_SPAWNTO_X64
S_PROXY_BEHAVIOR
S_PROCINJ_PERMS_I
S_HEADERS_REMOVE
S_PROXY_PASSWORD
S_PROCINJ_MINALLOC
S_PROCINJ_ALLOCATOR
S_MAX_RETRY_STRATEGY_ATTEMPTS
S_KILLDATE
S_C2_REQUEST
S_C2_POSTREQ
S_PROCINJ_PERMS
S_PROTOCOL
S_PUBKEY
S_PROCINJ_TRANSFORM_X64
S_DOMAIN_STRATEGY
S_SPAWNTO_X86
S_EXIT_FUNK
S_PROCINJ_EXECUTE
S_CFG_CAUTION
S_MAX_RETRY_STRATEGY_DURATION